Cobb-area earthquake reclassified as magnitude 4.5

LAKE COUNTY -- A magnitude-4.5 earthquake shook Lake County and could be felt as far away as San Francisco at 2:09 a.m. Thursday, according to the U.S. Geological Survey (USGS).

The quake was centered about three miles west southwest of Cobb, according to the USGS. There were as many as 10 aftershocks.

Residents reported feeling the quake across Lake County, including in Clearlake, Clearlake Riviera, Cobb, Lakeport and Hidden Valley Lake.

The South Lake County Fire Protection District, Cobb station reported no responses to major injury or damage related to the quake. PG&E reported no power outages occurred in the area.

The USGS website initially indicated the earthquake was magnitude 4.6, but the level was decreased to magnitude 4.5 by Thursday afternoon.

The USGS database shows there is a 90.341-percent chance of a major earthquake within 50 miles of Lakeport within the next 50 years. The most recent large quake within 50 miles of Lakeport was a magnitude-4.9 in 1992.

For more information on earthquake preparation, visit http://earthquake.usgs.gov/prepare/.